Sterling ST77 Circuit Upgrade Kit

We have developed a replacement circuit for the Sterling ST77. The circuit topology is a single-stage JFET with output transformer. We have optimized this circuit to create even-order harmonics, which add richness, saturation, and texture to your tracks. This product is identical to our best-selling T-84 circuit kit, adapted to fit the ST77 chassis.   Features & Benefits The new circuit has lower noise and superior sonics to the original. Combined with the RK-12 capsule, you can build our T-12 mic into your ST77 housing. The new circuit provides internal switches for a 10dB pad and polar pattern (Cardioid/Omni). The pattern switch requires a dual-diaphragm capsule, such as the RK-12 or RK-47.   In The Box You'll receive our T-84 circuit parts (including transformer) and instructions, with a PCB designed to fit the Sterling ST77.   Installation Notes The installation process is slightly more challenging than some of our other kits, for these reasons: We do not provide step-by-step